China WDMA American Style Aluminum Vertical Folding Glass Windows Doors double hung it can effectively reduce closing

it can effectively reduce closing speed

They are easy to install

Door leaf sheet 1mm cold roll steel Door frame 2mm cold roll steel Formaldehyde Emission E1 Standard Frame Cladding Frame Threshold 304 Stainless Steel Lock Fingerprint Lock Hinge 4pcs Anti-rust Concealed Hinges

Normal color is white

COLOR ASA Co-extrude

China WDMA American Style Aluminum Vertical Folding Glass Windows Doors double hung it can effectively reduce closingFactory Addr:: Shandong, China Brand Name:: WDMA Product Type:: Aluminum Folding Window Frame Material:: Aluminum Alloy Open Style:: Folding Opening Pattern:: Vertical Screen Netting Material:: Stainless Steel Uw Range:: 1. 7 6. 6 SHGC Range:: 0. 21 0. 66 Airtight Range:: 6. 6 Maximum Water Rating:: up to 450Pa Maximum Acoustic Rating:: Rw31 Maximum Wind Rating:: up to 1500Pa ULS Surface Treatment:: Powder Coated; PVDF Glass Standard:: CE AS2208 IGCC